#include
#include
#include

void* memorycopy (void *des, const void *src, size_t count)
{

  size_t n = (count + 7) / 8;
  char* destination = (char *) des;
  char* source = (char *) src;

  switch (count % 8)
  {
      case 0:  do{  *destination++ = *source++;
      case 7:  *destination++ = *source++;
      case 6:  *destination++ = *source++;
      case 5:  *destination++ = *source++;
      case 4:  *destination++ = *source++;
      case 3:  *destination++ = *source++;
      case 2:  *destination++ = *source++;
      case 1:  *destination++ = *source++;

    } while (--n > 0);
  }

  return des;
}

void tworegistervarswap (int *x, int *y)
{
  if (x != y)
  {
    *x = *x ^ *y;
    *y = *x ^ *y;
    *x = *x ^ *y;
  }
}

int bigintegeraverage (int x, int y)
{
  return (x & y) + ((x ^ y) >> 1);
}

int main (void)
{
  char *testArray = "This is a test.";
  char buffer[50];
  int x = 10;
  int y = 20;
  int m = 2000000000;
  int n = 1000000000;
 
  printf ("\nmemorycopy test before: %s", testArray);
  memorycopy (buffer, testArray, strlen(testArray) + 1);
  printf ("\nmemorycopy test after: %s", buffer);
  printf ("\n");

  printf ("\ntworegistervarswap test before: %d %d", x, y);
  tworegistervarswap (&x, &y);
  printf ("\ntworegistervarswap test after: %d %d", x, y);
  printf ("\n");

  printf ("\nbigintegeraverage regular code test: %d ", (m + n) / 2);
  printf ("\nbigintegeraverage function test: %d", bigintegeraverage (m, n) );
  printf ("\n");

  return 0;
}

Posted Date: 3/11/2013 5:57:55 AM | Location : United States

Ask an Expert

Related Discussions:- Example of switch case statement, Assignment Help, Ask Question on Example of switch case statement, Get Answer, Expert's Help, Example of switch case statement Discussions

Write discussion on Example of switch case statement
Your posts are moderated

Write your message here..

Related Questions

C programming language, write an algorithm that reads a postive integer n a... write an algorithm that reads a postive integer n and then finds and prints the sum of all integers between 1 and n (inclusive) that are disvisible by 7. please write this using c

I need file transfer solution, We move a high quantity of large Video files... We move a high quantity of large Video files (200mb - 2 GB each) across the internet. We have a Linux server (ubuntu) hosted in a datacenter (1Gbps) operating an FTP server. Our

Looping, Write a programme to display the patern.. A A B A C B A B C... Write a programme to display the patern.. A A B A C B A B C A B A A

Area under curve, Write a program to find the area under the curve y = f(x)... Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. #include float start_point,

Pebble merchant, 3 kilograms of peebles are needed for converting an area o... 3 kilograms of peebles are needed for converting an area of 1 square meter.the rate of the peeble is 5 per kilogram

Working with files in cpp, Operation Files 2.1. Your program should open an... Operation Files 2.1. Your program should open and read the file specified by the first command line argument of the program. 2.2. The first line of the file contains an integer

Result management system for mca, pl i need this before 24 march pl send it... pl i need this before 24 march pl send it

C program for rotation, Normal 0 false false false EN-U... Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Program, Byteland county is very famous for luminous jewels. Luminous jewel... Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Stack push pop, 2 flowcharts, pseudocode for each (at least 4 algorithms), ... 2 flowcharts, pseudocode for each (at least 4 algorithms), and code for either a stack or a queuestion..